Trimming-machine.



E.L.KEYES. TRIMMING MACHINE.-

APPLIGATION FILED 0GT.3, 1910.

1 076 431 Patented 001; 21, 1913.

2 SHEETS-SHEET 1.

E. L. REYES.

TRIMMING MACHINE.

APPLICATION FILED 0GT.'3, 1910.

1L 76 431L O Patented Got. 21, 1913.

2 SHEETS-SHEET 2.

a .m T/VESSESZ z practicable to allow for EUGENE L. KEY'ES, 0F BOS IGN, MASSMHUSETTS, ASSIGNDR T0 "UNITED SHQE MACHINERY COMPANY, OF QE'ATERSON, NEW JERSEY. A CQBPQWION 0F INF-Nv JERSEY.

Specification of Letters Ritent.

'lPaten'ted @ct. 211, 1913.

To all whom zit may concern:

Be it known that I, EUGENE L. Karine, a citizen of the United States, :resid'mg at'iBoston, in the county of Suffolk and State .of Massachusetts, have invented certain improvements in Trimming-Machines, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to trimming machines.

One of the first operations in the manufacture .of a Goodyear welt shoe consists in placing an insole accurately on the bottom of a last and driving several fasteners through it, usually with a tacker or a stapling machine, to secure it to the last. 'l hese insoles have previously been cut .out to fit the last accurately, then channeled, and the channel lip or flap turned back. The operation of turning back :the channel lip, and sometimes also the channeling operation, is performed while the insole is. in a dampened or tempered condition and this operation usually results in stretching the sole lengthwise so that when it is fastened to the last bottom, while it fits the forepart .accurately, its heel end nearly always projects beyond the heel end of the last. It is imthis stretching of the sole in cutting it out-because of the fact that the stretching varies greatly with different grades of stock, and with the degree of temper. In order to dorm a comfortable and well fitting shoe, however, it is essential that the insole fit the last accurately around the heel as well as atlother points and it has been customary therefore before proceeding further with the assembling of the shoe to trim off this projecting portion of (the heel end of the insole-with a hand knife. This expedient has been unsatisfactor. for the reason that it is slowand the teen ts are not uniform. Furthermore, in order to provide a-eomfortable seatfor the wearers heel particularly if a molded counter is to be used in the shoe, the heel end of the insole should bebeveled so that it will fit thecurve of the molded counter, if used, and in any case will provide a rounded surface -uver which ,the

upper and counter can be lasted. Hand workmen seldom take the pains to bevel off the insole in this manner.

flfhe present invention provides .a machine which, .while capable of other uses, is partlcularliy adapted to perform the trimming operat om above described.

An important feature of this invention consists in novel means for guiding or positioning the last during the operation of trimming the insole. In the preferred constnuction the trimming operation is performed by a rotary cutter. The guiding means referred to comprises a device that extends'between the bottom of the last and the insole and operates to guide or position the bottom of the last and to prevent any movement thereof into contact with the cutter. This device also has other functions that will be explained hereinafter. Preferably there is combined with this device means for guiding the sides of the last at or close to the edge formed by the junction of the bottom and lateral faces of the :last so that the line of cut will follow the edge contour of the tread face of the last. I find it preferable, although not indispensable, to se as a further aid in guiding the last a support that enters the last pin socket and enables the workman to give the last the .required movements :to trim the insole correctly with much less care and skill than otherwise would be required.

A further feature of this invention consists in novel means for supporting and guiding the insole in .a manner that insures uniform and accurate trimming. In attempting to trim an insole with a rotary cutter, difficulty is likely to be experienced with soles of soft or spongy stock due to their tendency to bend and twist out of the path of the cutter. This difficulty is obviated in the preferred embodiment of this invention by providing guiding devices that engage opposite ripheny of the cutter and hold its edge firmly against the cutter.

Referring to the accompanying drawings, Figure 1 ,is a side elevation of a preferred form of the invention; Fig. 2 is a front elevation of the manhine shown in Fig. 1.; and Fig. 3,is' a cross sectional view showing sides of the nsole close to the pe I the parts that guide the last and insole dur:

ing the trimming operation.

The column 2 supports a frame 4 having bearings for the reception of a shaft 6 which may be rotated by a belt running over the pulley 8 fast on the shaft. A rotary cutter 10 is secured to the forward end of the shaft. Mounted upon the column below the frame 4 is a bracket v12 to the forward end of which a guide carrying head 14 is pivoted so that it may be swung in a vertical plane toward or away from the cutter-10. The head 14 is secured in its normal or operative position by a latch 16 pivoted thereon and arranged to slide behind the head of a bolt 18 that projects through an aperture in the head and is threaded into an upright ortion of the bracket 12. The head 14 has inclined guideways formed therein to receive a guide plate 20 that has a guiding face or shoulder 22 formed on its lower end and a guiding lip 24 projectin slightl beyond said face along the inner e ge of t e guide, as best shown in Fig. 3. It will be noted that the inner face of the guide 20 is very close to the end of the cutter 10 and that the guiding face 22 is close to the periphery of the cutter. The guide 20 may be adjusted radially of the cutter by meansof an adjusting screw 26 that extends through a portion of the head and is held against movement therethrough, but has threaded engagement with the guide. Obviously turning the screw 26 will cause the guide to be moved in the guideways of the head in a direction depending upon the direction in which the screw is turned. The guiding face 22 is designed to engage the sides or lateral faces of the last to guide or position it radially of the cutter during the trimming operation, while the lip projecting between the tread face of the last and the insole serves to position the last axially of the cutter. Moreover, the lip guards the cutter from contact with the metal anvil plate with which the heel end of a last usually is provided.

'As above stated, a poor insole cut out of spongy stock tends to turn and twist during the trimming operation out of the path of the cutting teeth. In order to hold the sole firmly against the cutter a yielding presser member 28 is provided that bears against the outer face of the sole close to the periphery of the cutter and presses the Sole against the inner face of the lip 24. This presser member comprises a sole-engaging part inclined slightly to the plane of the lip to form a somewhat V-shaped space for the entrance of the sole edge, and ashank that is turned back sharply from said part and is mounted to slide in a guide- Way formed between adjacent faces of the head 14 and a plate 30bolted thereto. Since the cutter is usually of frusto-conical shape for the purpose of giving to the edge of the insole that bevel above stated to be desirable, the guideway for the member 28-is inclined in a direction substantially parallel to the periphery of the cutter. The

presser member 28 is urged toward the guiding lip 24 by a spring 32 and plunger 34 both working in a socket formed in the head 14 the plunger bearing against the rear si e of the presser member at a point adjacent to the cutter. The extent of the forward movement of the presser member is limited and may be varied by an adjusting screw 36' threaded through a part of the member 28 that is turned at an angle to the shank of said member at the rear end of the guideway, the ,end of the adjusting screw bearing against the rearward face of the head 14.

While it is possible to triminsoles satisfactorily on a machine constructed as above described without'the aid of other mechanism, I find that both time and skill on the part of the operator are saved by providing themachine with a support for the last. This support preferably comprises a bracket arm 38 secured to the column 2, a block 40 having a cylindrical shank pivoted in'the arm 38 and itself pivotally supporting a pin 42 to which an upright rod 44 is secured.

This rod carries at its upper end a last supporting pin 52-held loosely in a socket formed in the rod 44 by another smaller pin 17, Fig. 1, extending therethrough. This mounting for the last supporting pin is such that the pin may wabble in its socket particularly in directions transverse to the rod 44. It will be clear that the rod 44 may have auniversal movement about the two pivots 40 and 42 disposed at right angles to each other. For the purpose of limiting the movement of this rod about the axis of the pivot 42, an adjustable plate 21 is screwed onto the top of the arm 38 and a pin 19 is set through the pivot 42 in the manner shown in Figs. 1 and 2 so that when the rod 44 is rocked in one direction about the pivot, one end of the pin 19 strikes the plate 21, and when it is rocked in the opposite direction, the other end of the pin 19 strikes the bracket arm 38. The plate 21 is so positioned that it -will be engaged by the block 40 when the latter is swung in one direction and a pin 13 is set into the block to engage the plate 21 and limit the pivotal movement of the block in the opposite direction. The pivots are so located with relation to the rod that the rod will normally assume the position in which it is shown in Figs. 1 and 2.

In using the machine the workman slides a last having an insole secured thereto on to the supporting pin 52, then swings the support 44 and last toward the cutter head, guiding the last with his hand so that the lip 24 will be inserted between the last bot- Lean-col tom and the insole and the portion of the side of the last close to the tread face will bear against the shoulder 22. In positioning the last in this manner, the insole will slide in between the members 24 and 28, the latter member yielding to accommodate the edge of the insole and the former memher serving to litt the insole away from the bottom of the last. In starting the trimming operation, the toe of the last usually is raised to bring one side of the heel seat first into contact with the cutter 1,0 and the last is then swung forwardly and downwardly to move the entire edge around the heel to the-other side, past the cutter. The loose mounting of the pin 52' and the pivoted support for the rod 4C4 permit the movements of the last necessary to trim all the parts of the sole that project at the sides of the heel as ell as at the heel end. During the trimming'operation thesprlng 32 yields to compensate for variations in the thickness of the sole and maintains constantl-ya firm pressure on the sole close to the point of operation of the cutter and at a point opposite (with relation to the plane of that portion of the sole edge being trimmed) the point of operation of the cutter.

It usually is preferable to trim the edge of the insole so that the trimmed edge will lie flush with the lateral faces of the last.

Consequently, the guide 20 should be adjusted as shown In Fig. 3 so that the portion of the shoulder 22 that engages and guides the lateral faces of the last close to their junction with the tread face will lie in a plane extending parallel to the axis of the shaft and passing through the point Where the trimming operation takes place. It Will be noted that the guiding shoulder 22 is shapedto engage the last at the edge formed by the junction of the bottom and lateral faces of the last and it therefore guides the last along the line to which it is desired to have the trimmed edge conform.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is 1. A machine for trimming to the contour of the heel end of a last the heel portion of an insole attached to the bottom of the last comprising, in combination, a cutter,

and guiding means for relatively positioning the last and cutter including a device con- 'structed to extend between the tread face tachedto the bottom of a last comprising, in

combination, a cutter, guiding means to engage the sides of the last, a device located adjacent to the cutter to extend between the bottom of the last and the insole, and means to support the insole sufficiently close to the point of operation of the cutter to hold it against any tendency to bend away from the cutter;

3. A machine for trimming an insole attached to the bottom of a last comprising, in combination, a driven cutter, guiding means arranged to position the last in a plurality of directions relatively to said cutter, and means for engaging the insole suficiently close to the point of operation of the cutter to prevent it from bending away from the cutter.

4. A machine for trimming an insole-attached to the bottom of a last comprising a driven cutter, means for engaging the sides of the last to position it relatively tothe cutter as it is moved to present dilferent portions of the insole to the operation of the cutter, means arranged to extend between the bottom of the last and the insole, and

means located opposite to said last mentioned means to engage the outer face of the insole at a point close to the point of operation of the cutter to prevent the insole from bending away from the cutter.

5. A machine for trimming to the edge contour of the tread face of the heel portion of a last an insult: attached to the bottom of the last comprising, in combination, a driven cutter constructed and shaped totrim the edge of the insole, and guliding means for positioning the last relatively to the cutter including a device shaped to hold the insole away from the bottom of-the last during the trimming operation to prevent any interference between the cutter and the edge of the last.

6. A machine for trimming an insole attached to the bottom of a last comprising, in combination, a cutter, means for holding the insole away from the bottom of the last into position to be trimmed, and means for engaging the sides of the last to position the last relatively to said cutter to cause the line of cut to follow the edge contour of the bottom face'of the last.

7.'A machine for trimming an insole attached to the bottom of a last comprising a driven cutter, and positioning means located close to the cutter comprising a part designed to engage and guide the side faces of the last during the trimming operation, another part designed to project between the last bottom and the inner face of the insole and a device arranged to engage the outer face of said insole close to the point of operation of the cutter and opposite the point of operation of the cutter with relation to the plane of the edge being trimmed.

8. A machine for trimming an insole attached to the bottom of a last comprising a driven cutter, a guide located close to the insole away from theibottom of'the last into position to be trimmed, and guiding means mounted adjacent to the cutter comprising a part having a guiding face constructed to engage the side of the last close to its junction with the tread'face, said guiding face being positioned in a plane extending substantially parallel to the axis of the sh'aftand passing through the point where the trimming operation takes place.

10. A machine for trimming an insole attached to the bottom of the last comprising a rotary cutter, means for positioning the last both axially and radially of said cutter and means for engaging the insole suffi ciently close to the point of operation of the cutter to hold the edge of the insole in the path of the cutter.

11. A machine for trimming an insole attached to the bottom of a last comprising a rotarycutter, a guide mounted close to the cutter having a guiding surface arranged to engage and guide the sides of the last and a guiding lip arranged to project between the last bottom and the inner face of the insole and a presser member arranged to engage the outer face of the insole close to the periphery of the cutter at a point opposite said lip and to yield in a path parallel with the periphery of the cutter.

12. A machine for trimming an insole attached to the bottom of a last comprising a cutter mounted for rotation, a stationary guide mounted close to the end of said outter and having a shoulder designed to en gage and guide the side surfaces of a last, said guide having a thin ,beveled lip projecting beyond said shoulder in position to enter between the bottom ,of the last and the inner face of the insole, a presser member having a portion arranged to engage the outer face of the insole close to the, periphery of the cutter at a point opposite said lip, a guideway in which said member is mounted for sliding movement in a path substantially parallel with the periphery of the cutter, a spring for urgingsaid membertoward said lip and a stop for limiting the movement of said member toward the lip.

13. A machine for trimming an insole attached to the bottom of a last comprising in combination a beveled cutter mounted for rotative movement, a guide carrying head I mounted to be swung toward or away from said cutter, a stationary guide plate slidably v mounted in said head with its inner face normally positioned adjacent to the end of the cutter, said plate having a guiding face arranged to guide the lateral surfaces of the last and a thin beveled lip projecting beyond said face in position to enter between the bottom of the last and the inner face of an insole secured thereon, means for adjusting said plate relative to said head and said outter, a presser member arranged to bear against the outer face of the insole at a point close to the periphery of the cutter and opposite said lip, a guideway in which said member is mounted for sliding movement in a path substantially parallel with the pe- I riphery of the cutter, a spring and plunger cooperating with said presser member to urge it toward saidv lip and an adjustable stop for limiting the movement of said mem her by the spring and plunger.

14. A machine for trimming an insole attached to the bottom of a last comprising, in combination, a cutter, means for engaging the last substantially at the edge formed by the junction of its bottom and lateral faces 'to guide the last relatively to said cutter so that the line of cut will follow the edge contour of, the tread face of the last, and a device located adjacent to the cutter and constructed to project between the insole and the bottom of the last during the trimming operation.

15. A machine for trimming an insole attached to the bottom of a last comprising a driven cutter, guiding means positioned close to the cutter arranged to project between the last bottom and the inner face of the inso1e,-a devicearranged to engage the outenface of said insole close to the point of operation of the cutter and means for supporting said last during the trimming operation.

16. A machine for trimming an insole attached to the bottom of a last-comprising a driven cutter, means adjacent to the cutter arranged to project between-the last bottom and the inner face of the insole, a device arranged to engage the outer face of said sole opposite to said means and a support arranged to enter the socket of the last to guide the last during the trimming operation and constructed to enable the cutter to trim around the entire heel seat portion of the insole.

17. A machine for trimming an insole attached to the bottom of a last comprising a driven cutter, guidingv means positioned close to the cutter having a part designed to engage and guide the side surfaces of the last and another part arranged to project of operation of the cutter, and a support for name to this specification in the presence of the last constructed to permit movement of two subscribing Witnesses. the last relatively to the cutter to enable the EUGENE L REYES trimming; operation to proceed along the 5 sides of the heel as Well as around the end Witnesses:

of the heel. LEONARD ML JoHNsoN, In testimony whereof I have signed my JoHN H Mo-Gnneom 

